President Trump is seeking to end birthright citizenship in the United States. What is it, which other countries apply the policy and who would be affected by the order?

SEATTLE — A second federal judge in two days has blocked President Donald Trump’s effort to end birthright citizenship for the children of parents who are in the U.S. illegally, decrying what he described as the administration’s attempt to ignore the Constitution for political gain.

The injunction issued Thursday by a judge in Seattle came a day after another injunction stemming from a lawsuit in Maryland.